How many joules are there in 1 kWh?
60,000
3,600,000
216,000,000
How many hours are there in 1 week?
168
72
336
Which of the following should not be used for ‘one pound and fifty pence’?
150p
£1.50
£1.50p
What type of current flows in mains electricity?
a.c.
d.c.
a.c. and d.c.
Which of the following cut off the electricity when there is a difference between the currents in the live and neutral wires?
MCB (miniature circuit breaker)
Fuse
RCCB (residual current circuit breaker)
Which wire is a safety wire that can carry current safely into the ground if a fault develops in a metal framed appliance?
Live
Earth
Neutral
A kettle has a power rating of 2 kW. Which of the following fuses would be suitable for the kettle?
3 A
5 A
13 A
In which wire are switches and fuses placed?
Which two wires complete a mains circuit?
Live and neutral
Neutral and earth
Live and earth
What is the UK’s mains supply voltage?
250 V
2,300 V
230 V